Climate deniers like to claim that cold weather over eastern north America and Eurasia somehow contradicts a warming planet.
In fact, scientists are now observing what may become a more frequent pattern, caused by declining northern sea ice – of frigid polar air being pushed out of the arctic regions, while warmer air is drawn to northern areas.

• New York Times – A ‘Bulge’ in Atmospheric Pressure Gives Us a Super-Cold Winter Amid Global Warming
• The Independent – Expect more extreme winters thanks to global warming, say scientists
• This is not Cool – Big. Round. Complex. Get Used to it.